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Finding the Fourth Proportional to 8,128.99, 12,190.42 and 3,195.93

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Solution

The fourth proportional to 8,128.99, 12,190.42 and 3,195.93 is: 4,792.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.99 : 12,190.42 = 3,195.93 : x
  2. Step 2: Convert to fraction form
    8,128.99/12,190.42 = 3,195.93/x
  3. Step 3: Cross multiply
    8,128.99x = 12,190.42 × 3,195.93
  4. Step 4: Simplify right side
    8,128.99x = 38,959,713.01
  5. Step 5: Solve for x
    x = 38,959,713.01/8,128.99
  6. Step 6: Final answer
    x = 4,792.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.